Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cef5b6cef293be9…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 02:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b59c403148c6c3a7d63547d47510acdb SHA-1: c2fff2050910ed941cc6c08f4d1929c8b033761b SHA-256: 4cef5b6cef293be93b5d7e293127fa95eabb4e48fa5bb25f64e31adb5cc5f978
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF contains a link farm with numerous external links, many hosted on Shopify, designed to appear legitimate. However, one of the primary links, 'https://ttraff.com/pify?keyword=upkar+publication+book+pdf+download', is identified as a malicious redirector. This suggests the document's purpose is to trick users into clicking through to malicious sites under the guise of downloading a publication. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=upkar+publication+book+pdf+download In PDF document text
    • http://files.denisecummins.com/uploads/1/3/1/6/131606128/b9a19cea7fe.pdfIn PDF document text
    • http://files.ellipticgolfswing.com/uploads/1/3/0/7/130776567/pisetixoguzutut.pdfIn PDF document text
    • http://files.wadokaisouthwest.com/uploads/1/3/0/8/130874205/2922314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/4559877440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/excellence_in_business_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5338/7674/files/zuruseji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/tujko_dekha_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/basic_html_index_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/50678193269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0731/9965/files/20387272192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/35359707541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/buick_intellilink_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/calculus_7e_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/xanevatupitagufudinaluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/armed_conflict_survey_2020.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C4 5260 bytes
SHA-256: 0afb2ba9a29c337a521304ef48315a3de2ad11a4312ff460bdcbe3fa7c018381
font_01_sfnt_off00007bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC5 15040 bytes
SHA-256: ef00d64b3e4cbf691b498990d708053e51a82dd03fc9f3e8b6512d6f2880788b

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